Electric accumulator.



PATNTED NOV. 13', 1906. E

l: l SCHMITT G. FABR ELECTRIC AGGUMULA'IOR.

oIN Imm Nov. s. 1902.

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unirsi) srarns PATENT onirica.

'PAUL SCHMITT AND CHARLES FABRE, OF PARIS, FRANCE.

ELECTRIC ACCUNIULATOR.

Specification. of Letters Patent.

Patented Nov. 13, 1906.

Application led November 6,1902. Serial No. 130,313.

` others skilled in the art to which it appertains to make and use the same.v

The object of this invention is to provide a cheap accumulator of great capacity capable of rapid charging and discharging and that will not deteriorate in working. The accumulator-plates do not form a compact mass like those in existing accumulatore. p

in the accompanying drawings, Figure 1 is a perspective view of the plate or support for the active material. Figs. 2 and 3 are side and end sectional elevations, respectivel of the complete electrode; and Fig. 4 1s a agmentary view of the cheeks of the electrode.

According to this invention each accumulator-plate consists of a vertical strip e of lead from seven to twenty millimeters wide. To one of thc sides of this strip horizontal sheets or strips a of antimonid of lead are soldered. These sheets are superposed vand separated -fromone another by spaces of 0.01 meter.

,In order to avoid any breaking of the horizontal sheets where they are joined to the vertical strip, a partition or web is run in below the connection f in the plane of the plate, in the middle of the body thereof, as shown in Fig. l. This partition is intended to render .the plate at the same time very strong and of great conductive capacity. ln this manner a plate is made which has the form of a frame of seven to twenty millimeters in thickness with horizontal partitions a, three sides of the frame being formed by the vertical strip of lead, the upper` horizontal sheet, and the lower horizontal' sheet. The fourth side of the frame is formed by bending, as at c d, so as 'to render vertical the free ends b of the horizontal sheets. The top of the frame which is formed by the u per horizontal sheet supports the terminal or the taking off of current. Each of the large open and opposite sides of the frame, with horizontal .partitions forming the plate, is furnished with a rigid wall or cheek made of Celluloid, ebonite, wood treated with paraiiin, or any other material which is abad conductor, or of pure lead or antimonid of lead or any other metal not injurious to the electrolyte. These walls or .cheeks are made double, and each of them is formed of two `plates g h, vperforated and placed one against the other so that the holes in the one are not oppositetothe holes in t e the other. This arrangement enables t e liquid to pass through the rigid walls without the active material, which is placed between the partitions of the plate proper-that is to say, of the frame described-being able to pass through these walls.v`

The distinguishing feature of the invention is that the active material placed between i the partitions and retained between the `perforated cheeks is in the form of grains lying one n the other without being bound or soldered together. The horizontal sheets on which these grains are placed act as current-conductors.

IIn order that the cheeks placedv against the plate may be held parallel, a number of prerforated partitions i are 'arranged in the ame forming the plate parallel to the sheets of 4antimonid of lead supporting the active material.

The active material or paste for the positive-pole plates, which may be of any known kind, such as lead oXid, is finely powdered and kneaded in a leaden vessel with fifteen per cent. of distilled water, forty per cent. of glycerin, and forty-iive er cent. of sulfuric acid. The negative-po e electrode is made in a similar manner.

The kneading having been finished, the paste is run into thin layers on lead plates, where it is dried under cold process. It is then compressed in a hydraulic press and subsequently powdered and sifted. The' grains em loyed are about the size of 'a sphere, wit a diameter of seven-tenths'of a millimeter. f

In order to set up the electrode, thev'conductive plate formed by the frame with horizontal partitions is introduced between the two cheeks, and the side formed by thezyertical strip of the accumulator-plate iscovered by a small plate Through the opening opposite to this side the active material is introduced in the form of grains, the ends of the partitions of the frame forming the accumulator-plate and turned back and a covering effected by means of a small plate c. The accumulator-plate is thus finished, and, as will be seen, this plate proper is inclosed' in a rigid casing formed by the perforated cheeks and small plates. This arrangement produces perfect distribution of the electroany inconvenience.

on the sides ofthe conductiveeage 1s almost lytic .action and allows of the making of plates of a thickness of iifteen to twenty millimeters, reducing more than one-half at the same time as the hand-labor the number of separating-spaces, which are so man useless spaces, adding tothe bulk of or inary accumulators with thin electrodes forming a compact body. Moreover, the arrangement indicated prevents an deformation of the electrode under the in uence of the increase in volume. rThe conductive strips, in fact, joined at one end only can extend without Their mechanical strain nil, causing only a slight encroachin of the ends of the lower sheets on the ben of the upper sheet. The rains of material follow the movements of t e sheets. These grains may likewise increase in volume without being disinte ated, merely reducing the free spaces left etween them. No active material is pushed out through the holes in the walls, even in case of any excessive charge or discharge. The gases produced easily as- .cend through the small passages left between the active material, comprisin a vertical metal strip forming one sideoi the frame,

at one end to the vertical strip and havingtheir iree ends bent to form the o posite side of the frame, and perforated wal' s or cheeks adapted to prevent the passa e ofthe active material while allowing liqui to pass freely therethrough.

4. In an electric accumulator or secondary battery, a conductive rame or support for the active material, comprising a vertical metal strip forming one side of the frame, horizontal strips or partitions each connected at one end to the vertical strip and having their free ends bent to form the opposite side of the frame, granular active material supportedbetween the strips of the frame, and perforated walls or cheeks adapted to prevent the assage of the active material while allowing iquid to pass freely therethrough.

In testimony whereof we have affixed our signatures'in presence of two witnesses. f

PAUL SCHMITT. i CHARLES FABRE.

Nitnessesz HENRI BOETTCHER, EUGNE Priori-inn. 

